Diloma bicanaliculatum

Diloma bicanaliculatum
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Vetigastropoda
Order:	Trochida
Superfamily:	Trochoidea
Family:	Trochidae
Genus:	Diloma
Species:	D. bicanaliculatum
Binomial name
Diloma bicanaliculatum (Dunker, 1844) [1]
Synonyms
Diloma (Fractarmilla) lenior Finlay, H.J., 1927 Trochus bicanaliculatus Dunker in Philippi, 1844 (original combination)

Diloma bicanaliculatum, common name the knobbed top shell, is a species of small sea snail, a marine gastropod mollusk, in the family Trochidae, the top snails.^[2] The size of the shell varies between 10 mm and 20 mm.

Distribution[]

This marine shell is endemic to New Zealand and occurs off North Island, South Island and Stewart Island. A subspecies, Diloma bicanaliculata Lenoir, was once used for specimens between Cook Strait and Stewart Island.^[3] The subspecies is not listed on the World Register of Marine Species, so it may no longer be valid.^[2]

References[]

• Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
• Willan, R.C.; Marshall, B.A.; Climo, F.M.; Cernohorsky, W.O. 1980: Rectification of nomenclature for Melagraphia aethiops (Gmelin) and Diloma bicanaliculata (Dunker) (Mollusca: Trochidae). New Zealand Journal of Marine and Freshwater Research 14: 413-415
• Donald K.M., Kennedy M. & Spencer H.G. (2005) The phylogeny and taxonomy of austral monodontine topshells (Mollusca: Gastropoda: Trochidae), inferred from DNA sequences. Molecular Phylogenetics and Evolution 37: 474-483

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